We also supplied with plastic wing nut and washer for standard bottom installation. These are designed for toilet pan fixing, fit for most standard toilet seats and top fix hinge. Usage:Perfect for back to wall or wall hung toilet pans.
6 Pack Toilet Seat Bottom Fixings Kit - Plastic Wing Nuts & Metal Washers - Universal Replacement Toilet Seat Hinge Fittings (For Bottom Fixing Installation)
6 Pack Toilet Seat Screws, Hinges, Rubber Top Nuts, Fixings, Blind Hole Fittings